If you remember the age of entertainment anaglifowej 3D, these slim, thin cardboard glasses with red and blue lenses, probably come to mind. With the ability to understand person’s eyes two different angles of the same image or two different images, these red and blue lens bring the viewer to the perception of three-dimensional scenes through the visual process of color filtering. Unlike anaglifów, polarized 3D glasses bring eyes to see the 3D image by restricting the amount of light for General purposes, which falls in both eyes, regardless of color. These glasses usually have a yellow tinge.
With polarized glasses the screen is a web browser with two separate images through perpendicular polarizing filters built into sunglasses. This use polarity to create the illusion of depth, also known as stereoscopy . How stereo viewing, like polarized 3D glasses represent the passive 3D technology, which means that both use filtration of colors and images to display the 3D scene on the screen. But what if you want to get a more rewarding visual experience, which include the full spectrum of colors without any filtering? You will need a pair of active 3D glasses to achieve this.
Also known as shutter glasses , active 3D glasses to display stereoscopic 3D images to each eye separately. When viewing an image intended for the left eye image with the right eye is blocked, and Vice versa. This shift causes a very rapid shift of vision between the right and left eye, so that short breaks to remove perceived through the viewer merge two different images into one 3D image on the screen. But, as it makes a simple pair of glasses? Thanks to the technology of liquid crystal glass of each eye becomes opaque when voltage is applied but is transparent when the voltage is absent.
Most active 3D glasses receive energy from batteries or USB and controlled by a synchronization signal that allows them to alternately block one eye. This locking action there is in sync with the refresh rate of the screen connected to the glasses. Can be connected to the screen using the signals wired and wireless ( infrared and radio frequency ), depending on configuration experience you have.
What makes that the active 3D glasses have the advantage over the competition? First, are neutral in color , this means that the sunglasses are able to provide a full range of colors for the eyes. This minimizes the intrusiveness noticeable in the case of colored shades of yellow, blue or red to simulate 3D viewing. Active shutter glasses can also view the content in full HD resolution (1080p) without any loss of quality because the image on the screen do not overlap each other in simulated three dimensions. Finally, the active 3D technology is generally compatible with projekcyjnymi TVs, plasma and LCD.
A brief history of active 3D glasses
Although the concept of 3D viewing may seem like a modern invention, this concept has existed for a long time. In 1838, English scientist and inventor Charles Wheatstone invented the stereoscope for viewing three-dimensional images. It was, rather, a supporter of the machine is equipped with pop-up mirrors or lenses. Soon, the Scottish physicist Sir David Brewster improved the Wheatstone device by removing the mirrors and using prisms to connect niepodobnych images, which resulted in turning a stereoscope. Acting as binoculars , soczewkowy the stereoscope became the first portable device for viewing 3D.
Active system snapshots 3D, which is based on an appropriate system of glass, first appeared in 1922 and was called the Teleview 3D system . Was installed in the Selwyn Theater in new York and he had a few shows. The system worked on the basis of fingerprints of the right and left eyes by a pair of locking yourself projectors, which shutters were out of phase. Each seat in the theater to have their own device to view equipped in a rapidly rotating mechanical synchronized with the shutter of the projector.
LCD 3D glasses were invented in the mid 70-ies. Stephen McAllister from Evans and Sutherland Computer Corporation , which is currently focused mainly on graphics and digital planetarium shows, movies. Previous project McAllister included LCD displays, mounted on a small cardboard box with a ribbon. This type of shutter glasses spread quickly in the gaming industry up to 80 years, and the earliest known application is the SegaScope 3-D (combined with Sega Master System ).
This early form of active 3D glasses, which are driven by rotating disks with tape for curtains. In 2000, several companies have offered stereoscopic sets of glasses for LCD glasses for applications and games on a Windows computer, but they quickly lost value when the market has shifted from display monitors kineskopem (CRT).
Currently, some of the most modern forms of active 3D glasses, coming from companies such as Samsung use the same technology of the lenses and frames, which is currently intended for points that is used by NASA.
The choice of suitable pairs of active 3D glasses
Buying a 3D television, you need to keep in mind that some active 3D glasses are optimized for this technology. For example, some goggles are specially designed for TVs and projectors, while others work best in TVs, LCD or LED . Depending on the selected 3D TV, often it will be equipped in a corresponding pair of 3D glasses. This is a great opportunity to ask questions about the types of glasses that are compatible with your equipment, especially if Your TV doesn’t have any accessories upon purchase.
To minimize eye fatigue, it will be useful to find pairs of active glasses active shutter with a small reaction time . Some of the best active 3D glasses, work not only with independent battery power, but even offer a 40 hours before they needed replacements, so that will be the perfect choice for extended viewing.
Last but not the least is the lightweight design and ease, as you will be wearing these glasses for a long time, enjoying the entertainment. The last thing you want is a massive pair of 3D glasses, which causes headache.